Protective case for an electronic device



FIG. 1 is a rear perspective view of the protective case of the new design;

FIG. 2 is a front perspective view of the protective case of the new design;

FIG. 3 is a rear plan view of the protective case;

FIG. 4 is a front plan view of the protective case;

FIG. 5 is a left side view of the protective case;

FIG. 6 is a right side view of the protective case;

FIG. 7 is a top side elevational view of the protective case;

FIG. 8 is a bottom side elevational view of the protective case; and,

FIG. 9 is a front perspective view showing the protective case shown in an environment of use attached to a tablet computer, with the broken lines forming no part of the claim. 

CLAIM The ornamental design for the protective case for an electronic device, as shown and described. 